Using 'drag up' may evoke strong feelings as you're reminding someone of past events. I didn't mean to drag up old disputes.
Pro Tip 2/3
Negative Connotation
'Drag up' can imply a reluctance or resistance to discuss the past topic. He tends to drag up issues we've already resolved.
Pro Tip 3/3
Caution in Usage
Be mindful when using 'drag up'; it might suggest gossiping or speaking with little discretion. Gossiping about celebrities often involves dragging up scandals.